.checkbox {
    width: 1000px;
    background: #F8F8F8;
    overflow: hidden;
    margin: 110px auto;
    margin-top: 100px;
    border: 1px solid #e7eaf1;
    border-radius: 2px;
    box-shadow: 0 1px 3px rgba(0,37,55,.05);
}

.checkbox .content {
    max-width: 759px;
    height: 100%;
    padding-bottom: 20px;
    background: white;
    float: left;
}

.checkbox .content .up-head {
    padding: 20px 60px 20px 40px;
    color: #34495e;
    font-size: 24px;
}

.checkbox .content .up-head  i {
    font-size: 24px;
    vertical-align: middle;
    padding-right: 10px;
    color: #3498DB;
}

.checkbox .content .pic-main {
    width: 680px;
    min-height: 340px;
    border-top: 1px solid #EAEAEA;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.checkbox .content .pic-main h2{
    padding-top: 28px;
    padding-left: 40px;
    padding-bottom: 10px;
    font-size: 16px;
    text-align: left;
    font-weight: bold;
}

.checkbox .content .pic-main img {
    margin: 20px 0;
    margin-left: 50px;
    width: 480px;
    float: left;
}

.checkbox .content .pic-main .port {
    margin-top: 20px;
    margin-right: 25px;
    width: 70px;
    float: right;
}

.checkbox .content .pic-main .port a {
    margin: 0;
    width: 70px;
    height: 70px;
    padding: 0;
    border-radius: 50%;
    text-align: center;
    line-height: 70px;
    background-color: white;
    box-shadow: 0 0 5px rgba(0, 0, 0, .1);
    border: 1px solid #f3efef;
    font-size: 25px;
    font-weight: bold;
    display: block;
    margin-bottom: 20px;
}

.checkbox .content .pic-main .port a:hover {
    background-color: #efefef;
}

.checkbox .side {
    float: left;
    width: 240px;
    height: 100%;
    padding-bottom: 10px;
}

.checkbox .side h2 {
    color: #333333;
    font-size: 18px;
    line-height: 70px;
    height: 70px;
    padding-left: 20px;
}

.checkbox .side h3 {
    color: #999999;
    padding: 5px 15px;
    font-size: 14px;
}

@media only screen and ( max-width: 800px ) {
    .checkbox {
        margin-top: 60px;
        border-radius: 0;
        margin-bottom: 20px;
        border: none;
    }

    .checkbox .content .up-head {
        display: none;
    }

    .checkbox .content .up-head i {
        font-size: 16px;
    }

    .checkbox {
        width: auto;
    }

    .checkbox .content {
        float: none;
        padding-bottom: 20px;
    }

    .checkbox .side {
        float: none;
        margin: 0 auto;
        text-align: center;
    }

    .checkbox .content .pic-main {
        width: 100%;
    }

    .checkbox .content .pic-main h2 {
        padding: 20px;
    }

    .checkbox .content .pic-main img {
        width: 90%;
        margin: 0 5%;
    }

    .checkbox .content .pic-main .port {
        width: 50px;
        position: fixed;
        top: auto;
        left: auto;
        right: 20px;
        bottom: 20px;
        margin: 0
    }

    .checkbox .content .pic-main .port a:hover {
        background-color: white;
    }

    .checkbox .content .pic-main .port a:active {
        background-color: #efefef;
    }

    .checkbox .content .pic-main .port a {
        width: 50px;
        height: 50px;
        line-height: 50px;
        margin-left: 0;
        margin-right: 0;
    }
   
}